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Population structure and reticulate evolution of Saccharomyces eubayanus and its lager-brewing hybrids

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Population structure and reticulate evolution of Saccharomyces eubayanus and its lager-brewing hybrids

dc.contributor.author	Peris Navarro, David
dc.contributor.author	Sylvester, Kayla
dc.contributor.author	Libkind, Diego
dc.contributor.author	Gonçalves, Paula
dc.contributor.author	Sampaio, José Paulo
dc.contributor.author	Alexander, William G.
dc.contributor.author	Hittinger, Chris Todd
dc.date.accessioned	2016-01-11T13:22:52Z
dc.date.available	2016-01-11T13:22:52Z
dc.date.issued	2014
dc.identifier.citation	Peris Navarro, David Sylvester, Kayla Libkind, Diego Gonçalves, Paula Sampaio, José Paulo Alexander, William G. Hittinger, Chris Todd 2014 Population structure and reticulate evolution of Saccharomyces eubayanus and its lager-brewing hybrids Molecular Ecology 23 8 2031 2045
dc.identifier.uri	http://hdl.handle.net/10550/49925
dc.description.abstract	Reticulate evolution can be a major driver of diversification into new niches, especially in disturbed habitats and at the edges of ranges. Industrial fermentation strains of yeast provide a window into these processes, but progress has been hampered by a limited understanding of the natural diversity and distribution of Saccharomyces species and populations. For example, lager beer is brewed with Saccharomyces pastorianus, an alloploid hybrid of S. cerevisiae and S. eubayanus, a species only recently discovered in Patagonia, Argentina. Here, we report that genetically diverse strains of S. eubayanus are readily isolated from Patagonia, demonstrating that the species is well established there. Analyses of multilocus sequence data strongly suggest that there are two diverse and highly differentiated Patagonian populations. The low nucleotide diversity found in the S. eubayanus moiety of hybrid European brewing strains suggests that their alleles were drawn from a small subpopulation that is closely related to one of the Patagonian populations. For the first time, we also report the rare isolation of S. eubayanus outside Patagonia, in Wisconsin, USA. In contrast to the clear population differentiation in Patagonia, the North American strains represent a recent and possibly transient admixture of the two Patagonian populations. These complex and varied reticulation events are not adequately captured by conventional phylogenetic methods and required analyses of Bayesian concordance factors and phylogenetic networks to accurately summarize and interpret. These findings show how genetically diverse eukaryotic microbes can produce rare but economically important hybrids with low genetic diversity when they migrate from their natural ecological context.
dc.language.iso	eng
dc.relation.ispartof	Molecular Ecology, 2014, vol. 23, num. 8, p. 2031-2045
dc.subject	Hibridació
dc.subject	Saccharomyces
dc.title	Population structure and reticulate evolution of Saccharomyces eubayanus and its lager-brewing hybrids
dc.type	journal article	es_ES
dc.date.updated	2016-01-11T13:22:52Z
dc.identifier.doi	10.1111/mec.12702
dc.identifier.idgrec	093611
dc.rights.accessRights	open access	es_ES